Carriage-brake.



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CARRIAGE-BRAKE.

SPECIFICATION forming part of Letters PatentfNo. 638,925, dated December12, 1899; Application filed December 13, 1898. SerialNo. 699,114. (Nomodel.)

To @ZZ whom it may concern:

Be it known that I, GEORG HNSLER, a subject of the King of Bavaria,residing at Munich, Kingdom of Bavaria, Germany, haveinvented certainnew and useful Improvements in Carriage-Brakes, of which the followingisa full, clear, and exact description.

The present invention relates to carriagebrakes; and it consists inmeans for avoiding` the pawl-and-ratchet mechanism hitherto employed inthe hand-brakes used in connection with carriages and cars.

In order to render the present specification more easily intelligible,reference is had to the accompanying drawings, in which similar lettersof reference denote similar parts throughout the several views.

Figure l is a side elevation of the brake and hand-levers; Fig. 2, afront elevation, partly in section, of the same parts; and Fig. 3, across-section on the lineA B of Fig.

The brake-block and its operating-levers are omitted in the drawings, asthese parts are well known and the invention is confined exclusively tothe means for coupling the hand-lever to the lever for operatingthebrakeblock against the wheel.

The hand-lever is indicated by aand is provided with a boss having aninternal screwthread and adapted to move on, or rather Wedge against,theface of the boss of the brakeoperating lever b, also internallythreaded, both said levers being mounted on a screwspindle c, suitablyfixed to a convenient part of the carriage or car. The adjacent surfacesof the two bosses of levers c and b are indicated by 1I, and the lever cis provided with a lug d, extending behind the lever b and adapted tocouple both levers when the handlever a is moved in the oppositedirection to that indicated by the arrow in Fig. l.

The device operates in the following manner: In order to apply thebrake, the hand or power lever a is moved in the direction of the arrowin Fig. l. The effect of this movement is to couple the surfaces orfacesiby friction and to move the brake-operating lever h together withthe lever a and in the same direction. As soon as the brake touches thewheel the friction between the faces at 1I will be increased inproportion to the amount of power of the brake-block against the wheel,as will be evident. When the brake is to be taken off, the lug d movesthe brake-operating lever b back with the lever a on its (the latters)movement in the opposite direction to that indicated by the arrow inFig. l.

It will thus be seen that all pawl mechanisms are avoided by the presentdevice, the construction of which is simple and effect-ive.

4I claim as my inventionlu. In a carriage-brake the combination of apower-lever and a brake-operating lever both havinginternally-screw-thread ed bosses and mounted on a suitablescrew-spindle, so as to jam with their adjacent faces when thepower-lever is moved, to apply the brake, and a lug on the saidpower-lever to return the brake-operating lever to its initial positionwhenthe brake is taken off substantially as described.

2. The combination of asuitably-mounted screw-threaded spindle c, apower-lever having internally-threaded boss to engage said spindle and abrake-operating lever b having also screw-threaded boss and having itsface close up to that of the boss of the power-lever and means forcoupling the two levers eX- terior of the bosses on the return stroke ofthe power-lever to take oft the brake substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

Girone HNsLER.

Witnesses:

Josnn Hr'rNsLnR, PAUL WORTH.

